Tensioning systems

Function, principles, handling

Our tensioning systems are free-running and resilient. As a result, they do not function as rigid deflectors when stressed. This avoids excessive contact pressure. Our systems aim to keep the overall force on the slack strand – resulting from the weight of the chain and the centrifugal force – under control. The ideal installation position is right behind the drive sprocket in order to keep the length of the slack strand that needs to be tensioned as short as possible.

Murtfeldt Spannsysteme: Funktion, Prinzip und Handhabung von Murtfeldt Kettenspannern und Riemenspannern.

Tried-and-tested quality

The stable design of the steel housing makes our tensioning systems resistant to high mechanical loads. Our housings and tensioning systems are galvanized, which provides protection against corrosion. A plastic lacquer makes the surface impact and scratch resistant. In addition, we offer a stainless steel range for particularly high corrosion resistance requirements. All slide profiles are made of Original Material "S"®.


Special holding mechanisms initially hold back the spring action. When these retainers are released following the installation, the tensioning pressure is released in a targeted manner.

Tensioning force regulation

For all Murtfeldt tensioning systems, you can choose either light or heavy tensioning pressure. Depending on the type, the tensioners have one, two, or three springs. You decide how many springs you want to use. This enables the optimum application of pressure onto a chain or belt running on the profile.

The red dot on the SPANN-BOX® means 'heavy tensioning force'.

Use at extreme temperatures

If you choose the correct plastic material, you can also use our tensioning systems in otherwise problematic temperature ranges.

For temperatures above 60°C, please contact our application technology team.

The maximum speed is 1m/ sec. For higher speeds we will be pleased to advise you.

For our steel springs the following conditions are applicable:

  • Normal steel springs: -10 to +170oC
  • Stainless steel springs: -40 to +200oC

Optimum installation position

Murtfeldt tensioning systems: optimum installation position

The weight on the return side of the chain that is to be tensioned should not be greater than the force of a spring already 50% released.

Employees from our application technology department are constantly available to make sure that we are able to provide the best product to meet your requirements.